Tandem sub



FIG. 1 is a front perspective view of a tandem sub showing an embodiment of our new design;

FIG. 2 is a rear perspective view of the tandem sub of FIG. 1;

FIG. 3 is a top plan view of the tandem sub of FIG. 1;

FIG. 4 is a bottom plan view of the tandem sub of FIG. 1;

FIG. 5 is a left-side elevated view of the tandem sub of FIG. 1;

FIG. 6 is a right-side elevated view of the tandem sub of FIG. 1;

FIG. 7 is a front elevated view of the tandem sub of FIG. 1;

FIG. 8 is a rear elevated view of the tandem sub of FIG. 1;

FIG. 9 is a cross-section view of the tandem sub of FIG. 3 along line 9-9; and,

FIG. 10 is a cross-section view of the tandem sub of FIG. 3 along line 10-10.

The broken lines consisting of dashes show an environment that forms no part of the claimed design. The broken lines consisting of a double-dot/dash pattern show a boundary of the claimed design. 

CLAIM I claim the ornamental design of a tandem sub, as shown and described. 